I have many regrets, and I'm sure everyone does. The stupid things you do, you regret... if you have any sense, and if you don't regret them, maybe you're stupid.
I think most of the people involved in any art always secretly wonder whether they are really there because they're good or there because they're lucky.
Life is to be lived. If you have to support yourself, you had bloody well better find some way that is going to be interesting. And you don't do that by sitting around.